Collapsible poet fob furnaces



April 28, 1931. J, P McLlMANS 1,802,663

COLLAPSIBLE PORT FOR FURNACES Filed July 28, 1927 3 Sheets-Sheet l Jak/ZHmmm April 28, 1931. J. P. MCLIMANS 1,802,663

coLLAPsIBLE PORT PQR FURNAcEs Filed July 28, 1927 3 sheets-sheet 2 gijApil 28, 1931. J. P. McLlMANs 1,802,663

- COLLAPSIBLE PORT FOR FURNACES Filed July 28, 1927 3. Sheets-Sheet 3Patented Apr. 28, 1931 Y srarss PATENTE Price JOHN P. MCLIMANS,OFDULUTI-I, MINNESOTA COLLAPSIBLE PORT FOR FURNACES Application led July28, 1927. Serial No.. 208,933.

This invention relates to a new and im- Figure 2 is a face View of thewater coolproved collapsible port for furnaces and ing elements inassembled relation; more particularly to a collapsible water Figure 3 isa horizontal section taken on cooled structure particularly adapted' forline 3 3 of Figure 1; s 5 use .in open hearth furnaces. Figure 4 is afragmentary vertical section 55 In reversible furnaces, such as those oftaken on line 4-4 of Figure 1; the open hearth type where the ports areFigure 5 is a plan view of the key cooling subjected to theerosive'action of the outgoing element; M gases during a portion of thefurnace oper- Figure 6 iS a SGCOD taken 011 lin@ 6-6 t ation, it hasbeen customary to providey water of Figur@ 5; i

cooling means in order to maintain the port Figure 7 iS a View Of Figure5 as Seen lines and preventthe port from being worn frOm the right;away. These water cooling means as here- Figure 8 S a SeCtOn On line 8 8of ,a tofore constructed, have consisted of large Figure 5; p ametal'elements permanently built into-the Flgule 9 is aplan view showingthe 61- 65 port structure and having very considerable ments partlyassembled; Y Y water cooledl area. This large area has re- Figure l0 S aSeCOD taken 0H lille 10-10 sulted'in considerable heat losses during the0f Figure V9; I L, operation of the furnace. The fact that the Figure 1ls a View on an enlarged Scale t@ water cooling structure is permanentlybuilt 0f ODG 0f the Side COOlIlg elmenS S S6011 70 into the portrequires that the use ofthe fur- JIOIH the Tear; nace be stopped andthat it be cooled down Figure 12 iS 2L VW Similar U0 Figure ll if anyrepairs 0r replacements of the Water but showing the elements as seenfrom the cooled Structure are require@ side, the internal constructionbeing indi* .o It is an object of the present invention to Cate@ inbfokellnes 75 provide a water Cooled port, Structure haw Figure 13 is afragmentary section taken ing a minimum ofrwater cooled area. 0D 1in@13-13 0f Figur@ 125 Itis also an object to provide a construc-v Figure14 is @fragmentary Section taken tion of this character in whichA thevwater 0n une 141-14 0f Figure 125 and .50 cooled elements may be readilyremoved and Figure l5 is a fragmentary Section mha?? 80 c 50 pliedthereto.

replaced without materialinterference with 011 line 15-15 0f Figure 12-the furnace Operation rThe furnace as shown is of a usual open "It is afurther Object to provide a Water hearth type having the melting chamber21, m, cooling structure consisting of a plurality the gasV Port 22amegas uptake and the mi of elements which coact with'each other to @1fuptakes 2li: leadlng t? the all" Port 85 mutually Support each other inplace A recess 26 is formed 1n the brickwork Itis an additional objectto provide a adlacent the fqwad end 0f the Port: HPS multiple elementcooling structure inl which recess termmatmg m Shoulders 27* ulm the oneelement serves as a key rto lock the other lateral portlons thereof'.Tha brlckwork J elements n'placa s 1s sloped. away along the line 28from the 90 O t1. d f upper portion of the recess 26 forca purpose the.drtionugece]@cts Wlu appear as which will appear hereafter. As bestshown I have ,illustrated in the accompanyna 1n Figure 4, the brickworkof the interior of the port is provided with a plurality of "-5 llgll aPreferred embodlment of my recesses 29 extending longitudinally of the95 I} e TLWmgS-j VThe water cooling structure consists of a Figure 1isjavertical longitudinal section pair of side elements 30 and a centralvkey of a furnace end showing my structure apelement 31. The central keyelement is Y shown in detail in F igurcs toY 8. Its sides member aspreviously described.

32 incline outwardly towards the rear of the element to give it awedge-shaped formation, as clearly shown in Figure 5. These sides 32 arealso formed of two outwardly sloping portions, as clearly shown inFigures 7 and 8 which fit against corresponding side formations of theside elements.I as shown in the assembled figures.

The cooling water discharge pipe is secured to the element 31 andcontains within it the smaller pipeV 34 which serves to feed the coolingwater to the element. The pipe 34 extends well down into the element, asclearly shown in Figure 6. rIhis brings the cooling water down againstthe outer face of the element while the heated water is drawn outthrough the pipe 33 from the rear end of the element around the pipe 34.

The side elements, as clearly shown in Figures l1 to l5, are also formedof hollow metal and have each connected thereto a large water` dischargepipe 85. This pipe 35 encloses the smaller water feed pipe The waterfeed pipe 36 discharges into the cavity 37 formed in the casting whichcavity extends down adjacent the bottom of the casting. rllhe heatedwater rises in the casting and is withdrawn over the partition 38through the outlet chamber 59 which surrounds the smaller pipe 36. Thelower edge 40 of the casting is on an angle corresponding to that of thedoor of the port. The upper edge 4l is recessed to correspond to theedge of the central key The recess 26 formen in the port structure maybe deepened at 42, as shown in Figure l0, to provide room for the upperenlargements of the side elements.

In assembling the water cooling structure in the furnace the two sideelements are moved axially down the port from the rear until they arebrought opposite the recess in the end of the port and are then movedlaterally so that their lower portions are fitted within the recess. hecentral key member is then moved down axially of the port and broughtinto position between the upper edges of the side members. It is movedupwardly and forwardly on an angle through the extension 28 of therecess 2G, forcing the two lateral elements apart, as indicated. inFigure 9, until all three elements are firmly seated against the upperwall of the recess. rIhe water pipes t up into the axially extendingrecesses 29.

It will be apparent ythat the elements present arelatively smalll amountof cooling surface to the gases but adequately protect the port endwhich is most subject to erosion. The elements be readily removed andreplaced by new elements merely by breaking down a small portion of thei rear wall of the gas uptake, This may be accomplished without materialdelay in the furnace operation.

While I have shown one preferred form of my invention by way of example,it is capable of wide modification in structure and I contemplate suchvariations and changes as come within the spirit and scope of theappended claims.

I claim:

l. In a furnace port, water cooling means for said port comprising aplurality of elements shaped to form an arch when in assembled relation,one of said elements being adapted by its shape to be forced betweenother of said elements to hold the assembly in arch formation.

2. In a furnace port, water cooling means` for said port comprisingthree elements associated in arch formation, the central element beingwedge-shaped and engaging inclined faces on the lateral elements.

3. In a furnace port construction, brickwork built to form an internalrecess, and water cooling means comprising a plurality of elementsadapted to be removably fitted in said recess, one of said elementsbeing wedge-shaped and adapted to lock the elements in arch formation insaid recess.

4. In a furnace port construction, brickwork built to form an internalrecess, and Water cooling means comprising a plurality of elementsadapted to be removably fitted in said recess, one of said elementsbeing wedge-shaped in a plane extending axially of the port and adaptedto lock the elements in arch formation in said recess by movementaxially of the port.

5. In a furnace port construction, brickwork built to form an internalrecess having shoulders on its rear edge, side water cooling elementsadapted to t in said recess against the shoulders, and a key watercooling element adapted to be forced axially of the port between theside elements to lock them in place.

6. In a furnace port construction, brickwork built to form an internalrecess having shoulders on its rear edge, side water cooling elementsadapted to t in said recess against the shoulders, and akey watercooling element adapted to be forced axially of the port between theside elements to lock them in. place, the rear edge of the recess beingcut away at its middle portion to permit axial movement of thekeyelement.

7 A furnace including a port, a collapsible water cooling assemblymounted in said port, said assembly comprising a top key member and twoside members shaped to receive said key member, water pipescommunicating with each of said members and so arranged that the top keymember may be inserted axially into place.

8. A furnace including a port, a collapsible water cooling assemblymounted in said port, said assembly comprising a top key member providedwith Wedge shaped side Walls, and two side members shaped to receivesaid key member, Water pipes oommunicating with each of said members andsov arranged that the top key member may be inserted axially into placeWhile said pipes remain connected thereto.

Signed at Duluth, Minnesota, this 28th day of April, 1927.

JOHN P. MOLIMANS.

